H-R Diagrams Based on the HD Stars in the Michigan Spectral Catalogue and theHipparcosCatalog
The Astronomical Journal2007Vol. 134(3), pp. 1089–1102
Citations Over TimeTop 20% of 2007 papers
Abstract
The systematic, spectroscopic two-dimensional classification of the HD stars by N. H. is approximately three-quarters complete. Over 161,000 stars have been classified visually using 10° objective-prism plates (2 Å resolution) taken at CTIO with the Michigan Curtis Schmidt telescope. The published portion of this large, homogeneous database, taken from volumes 1-5 of the Michigan Spectral Catalogue (declination -90° to +5°), has been used to create an H-R diagram. The Hipparcos parallax measurements provide a large homogenous database, too. H-R diagrams of the HD stars found in both catalogs are produced for distances to 20, 50, 100, and 200 pc.
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